/*
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package io.trino.matching.example.rel;

import java.util.List;

import static java.util.Collections.singletonList;

public interface SingleSourceRelNode
        extends RelNode
{
    RelNode getSource();

    @Override
    default List<RelNode> getSources()
    {
        return singletonList(getSource());
    }
}
